Electron configuration exceptions

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Sang Hyoun Hong 3G
Posts: 31
Joined: Fri Sep 28, 2018 12:27 am

Electron configuration exceptions

Postby Sang Hyoun Hong 3G » Sun Oct 28, 2018 9:12 pm

Can someone explain the exceptions for electron configuration? Why is it that some elements have half filled orbitals and skip to the next?

AustinGrove3B
Posts: 53
Joined: Fri Sep 28, 2018 12:23 am

Re: Electron configuration exceptions

Postby AustinGrove3B » Sun Oct 28, 2018 9:30 pm

Having full or half full subshells is less potential energy than having semi full subshells. For that reason, sometimes electrons will be taken from the s subshell to fill the d subshell.

Kavya Juwadi 3C
Posts: 30
Joined: Fri Sep 28, 2018 12:25 am

Re: Electron configuration exceptions

Postby Kavya Juwadi 3C » Sun Oct 28, 2018 10:05 pm

An example of this irregularity would be that that the electron configuration of Copper(Cu) would be [Ar]3d^10, 4s^1. Instead of having 9 electrons in the d subshell, the elements would be at a lower potential energy with 10 electrons, taking one away from the s subshell.

kateminden
Posts: 63
Joined: Fri Sep 28, 2018 12:24 am

Re: Electron configuration exceptions

Postby kateminden » Sun Oct 28, 2018 10:09 pm

AustinGrove3B wrote:Having full or half full subshells is less potential energy than having semi full subshells. For that reason, sometimes electrons will be taken from the s subshell to fill the d subshell.


Thanks, I was confused about this too, and this example was so helpful!


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